.c_fv {
  position: sticky;
  top: 0;
  z-index: 1;
  width: 100%;
  height: calc(100vw / var(--image-aspect-ratio));
}

.c_fv-image {
  width: 100%;
  height: 100%;
}

.c_fv-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}